Derive Macro async_graphql::NewType

#[derive(NewType)]

Define a NewType Scalar

Examples

use async_graphql::*;

#[derive(NewType)]
struct Weight(f64);

struct QueryRoot;

#[Object]
impl QueryRoot {
    async fn value(&self) -> Weight {
        Weight(1.234)
    }
}

async_std::task::block_on(async move {
    let schema = Schema::build(QueryRoot, EmptyMutation, EmptySubscription).data("hello".to_string()).finish();

    let res = schema.execute("{ value }").await.into_result().unwrap().data;
    assert_eq!(res, value!({
        "value": 1.234,
    }));

    let res = schema.execute(r#"
    {
        __type(name: "QueryRoot") {
            fields {
                name type {
                    kind
                    ofType { name }
                }
            }
        }
    }"#).await.into_result().unwrap().data;
    assert_eq!(res, value!({
        "__type": {
            "fields": [{
                "name": "value",
                "type": {
                    "kind": "NON_NULL",
                    "ofType": {
                        "name": "Float"
                    }
                }
            }]
        }
    }));
});